package rpt.task;

import java.security.MessageDigest;

public class MD5
{

    public MD5()
    {
    }

    public static final String md5(String s)
    {
        char hexdigits[] = {
            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 
            'a', 'b', 'c', 'd', 'e', 'f'
        };
        try
        {
            byte strtemp[] = s.getBytes();
            MessageDigest mdtemp = MessageDigest.getInstance("MD5");
            mdtemp.update(strtemp);
            byte md[] = mdtemp.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for(int i = 0; i < j; i++)
            {
                byte byte0 = md[i];
                str[k++] = hexdigits[byte0 >>> 4 & 0xf];
                str[k++] = hexdigits[byte0 & 0xf];
            }

            return new String(str);
        }
        catch(Exception e)
        {
            return null;
        }
    }
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String ms = MD5.md5("123456");
		System.out.println(ms);
	}
}
